After that, Select ISO file and Extract it, After its Done, Open the Folder and Delete SYSTEM UPDATE folder, And if you want to make Rip Even Smaller then Delete All other Languages Except English, Plus Delete all other Crap Files You find
Then, Just Copy Folder Into USB and then Play From DEFAULT.XEX File.
2) Ripping A DVD
Download the latest XBOX BACKUP CREATOR which supports XGD3